These are the steps to follow in order to create and configure an 
arena:



1) Creating the arena using:

/skywars create <arena name> [min players] [max players]

Where min players is equal to the minimun amount of players to make 
the arena start, and max players to the maximum amount of players that
an arena can have.



2) Saving the map area using:

/skywars pos1 <arena name>
/skywars pos2 <arena name>

In order to kill players that go out of the map and to properly recognize
the arena you have to define a map area; to do so, simply specify its 
corners by using the two commands above.
Once you've done this you can put "@" instead of the arena name in any command
to automatically get the one you're standing in. 



3) Editing the arena using:

/skywars edit <arena name>

In this menu you can add spawn points, set up the timer and the sign to
enter the arena: the spawn points are where the players will spawn when 
they enter the arena, the timer's a value decrementing from whatever you set 
it until 0, and the sign is just the way to  enter the arena (by clicking it).



4) Setting the arena treasures (the items that can spawn in the 
chests):

/skywars addtreasure <arena name> <item> <count> <preciousness>
<rarity (min 1.0, max 10.0)>

item: the item name;
rarity: how often it will spawn in chests;
preciousness: in which chests it can be put, for example a chest with
a preciousness range 2-4 can just spawn items with a preciousness
between 2 and 4;
count: the item amount.


You can also use:

/skywars addtreasure hand <arena name> <preciousness>
<rarity (min 1.0, max 10.0)> 

that will get the item name and count from the one in your hand.



5) Setting the chests in the arena using:

/skywars addchest <min_preciousness> <max_preciousness> 
<min_treasures_amount (min. 1)> <max_treasures_amount>

To add a chest that will be filled with the right treasures when the match
starts, this will set the position to the node you're looking at (not over it).


! WARNING !
To modify a map you must use use /skywars reset <arena name> and then disable 
the arena, otherwise your changes may get lost.
Everything you change when the arena's disabled won't be saved, so make
sure to properly reset your map before doing so.



6) (Optional) Creating and setting the kits using: 

/skywars createkit <kit name> <texture name>

<texture name> is the texture that the kit button will have in the selector menu at the start of the match,
it must be a file name that you put in the "<SKYWARS MOD FOLDER>/textures" folder.


/skywars additem <kit name> <item> <count> 
or
/skywars additem hand <kit name>

With this you can add items to it.


/skywars arenakit add <arena name> <kit name>

Each arena has a "kits" property that contains the choosable kits, with this command you add one to it.



7) Enabling the arena using

/skywars enable <arena name>




Once you've done this you can click the sign and start playing :).
You should use /help skywars to read all the commands.
To modify the game settings (such as the messages prefix or the
hub spawn point) you can edit the "<SKYWARS MOD FOLDER>/SETTINGS.lua" file.